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                    十五、回溯算法
            
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                    十六、单调栈
            
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<h1 id="2-&#x6570;&#x636E;&#x5E93;-databasedb"><a name="2-&#x6570;&#x636E;&#x5E93;-databasedb" class="anchor-navigation-ex-anchor" href="#2-&#x6570;&#x636E;&#x5E93;-databasedb"><i class="fa fa-link" aria-hidden="true"></i></a>2. &#x6570;&#x636E;&#x5E93; (Database,DB)</h1>
<p><strong>&#x5B9A;&#x4E49;&#xFF1A;</strong>  &#x6570;&#x636E;&#x4ED3;&#x5E93;&#xFF0C;&#x5B58;&#x50A8;&#x6570;&#x636E;&#x7684;&#x4E00;&#x4E2A;&#x300C;<strong>&#x6587;&#x4EF6;</strong>&#x300D;&#x3002; <strong><code>&lt;= 500w</code>&#x7684;&#x6570;&#x636E;&#x968F;&#x4FBF;&#x5B58;&#x50A8;&#xFF0C;&#x8D85;&#x8FC7;&#x4E86;&#x5C31;&#x9700;&#x8981;&#x4F18;&#x5316;&#x3002;</strong></p>
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<li><strong>&#x975E;&#x5173;&#x7CFB;&#x578B;&#x6570;&#x636E;&#x5E93;<code>NOSQL (Not Only SQL)</code></strong><ul>
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<ul>
<li><strong>&#x7C7B;&#x578B;&#xFF1A;</strong> &#x5173;&#x7CFB;&#x578B;&#x6570;&#x636E;&#x5E93;&#x7BA1;&#x7406;&#x7CFB;&#x7EDF;&#xFF08;Relational Database Management System&#xFF09;&#x3002;</li>
<li><strong>&#x516C;&#x53F8;&#xFF1A;</strong> &#x7531;&#x745E;&#x5178; <code>MySQL AB</code> &#x516C;&#x53F8;&#x5F00;&#x53D1;&#xFF0C;&#x5C5E;&#x4E8E; <code>Oracle</code> &#x65D7;&#x4E0B;&#x4EA7;&#x54C1;&#x3002;</li>
<li><strong>&#x7279;&#x70B9;&#xFF1A;</strong> &#x5F00;&#x6E90;&#x514D;&#x8D39;&#xFF0C;&#x4F53;&#x79EF;&#x5C0F;&#xFF0C;&#x6210;&#x672C;&#x4F4E;&#xFF0C;&#x9002;&#x7528;&#x4E8E;&#x5927;&#x4E2D;&#x5C0F;&#x7F51;&#x7AD9;&#x3002;</li>
</ul>
<blockquote>
<p>[!tip]
<a href="https://blog.csdn.net/qq_33472557/article/details/77861692" target="_blank">MySQL&#x5B89;&#x88C5;</a></p>
</blockquote>
<h1 id="5-mysql&#x7B80;&#x5355;&#x4F7F;&#x7528;"><a name="5-mysql&#x7B80;&#x5355;&#x4F7F;&#x7528;" class="anchor-navigation-ex-anchor" href="#5-mysql&#x7B80;&#x5355;&#x4F7F;&#x7528;"><i class="fa fa-link" aria-hidden="true"></i></a>5. MySQL&#x7B80;&#x5355;&#x4F7F;&#x7528;</h1>
<ul>
<li>&#x542F;&#x52A8;<code>MySQL</code>&#x670D;&#x52A1;</li>
</ul>
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      <div class="terminullButtons terminullMinimize"></div>
      <div class="terminullButtons terminullZoom"></div>
    </div>
    <div class="terminullScreen">
        
          <span class="terminullDirectory">triangle@LEARN_FUCK:~/mysql</span>$ 
          <span class="terminullCommand">net start mysql</span>
          
          <i class="fa fa-clone t-copy terminullCopyBtn" onclick="copyCommandTerminull(`net start mysql`)"></i>
          <span class="terminullOutput"></span>
        
    </div>
</div><p></p>
<ul>
<li>&#x505C;&#x6B62;<code>MySQL</code>&#x670D;&#x52A1;</li>
</ul>
<p></p><div class="terminull">
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    <div class="terminullScreen">
        
          <span class="terminullDirectory">triangle@LEARN_FUCK:~/mysql</span>$ 
          <span class="terminullCommand">net stop mysql</span>
          
          <i class="fa fa-clone t-copy terminullCopyBtn" onclick="copyCommandTerminull(`net stop mysql`)"></i>
          <span class="terminullOutput"></span>
        
    </div>
</div><p></p>
<ul>
<li>&#x7EC8;&#x7AEF;&#x767B;&#x5F55;<code>MySQL</code></li>
</ul>
<p><code>-p</code>&#x540E;&#x9762;&#x662F;&#x76F4;&#x63A5;&#x8DDF;&#x5BC6;&#x7801;&#xFF0C;&#x4E0D;&#x8981;&#x6709;&#x7A7A;&#x683C;&#x3002;</p>
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          <span class="terminullDirectory">triangle@LEARN_FUCK:~/mysql</span>$ 
          <span class="terminullCommand">mysql -u root -p</span>
           
            <span class="terminullComment"># -u [user]&#xFF1B;-p [password]</span>
          
          <i class="fa fa-clone t-copy terminullCopyBtn" onclick="copyCommandTerminull(`mysql -u root -p`)"></i>
          <span class="terminullOutput"></span>
        
    </div>
</div><p></p>
<ul>
<li>&#x6E05;&#x7406;&#x5E72;&#x51C0;<code>MySQL</code></li>
</ul>
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          <span class="terminullDirectory">triangle@LEARN_FUCK:~/mysql</span>$ 
          <span class="terminullCommand">sc delete mysql</span>
          
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</div><p></p>
<h1 id="6-&#x89C4;&#x8303;&#x6570;&#x636E;&#x5E93;&#x8BBE;&#x8BA1;"><a name="6-&#x89C4;&#x8303;&#x6570;&#x636E;&#x5E93;&#x8BBE;&#x8BA1;" class="anchor-navigation-ex-anchor" href="#6-&#x89C4;&#x8303;&#x6570;&#x636E;&#x5E93;&#x8BBE;&#x8BA1;"><i class="fa fa-link" aria-hidden="true"></i></a>6. &#x89C4;&#x8303;&#x6570;&#x636E;&#x5E93;&#x8BBE;&#x8BA1;</h1>
<h2 id="61-&#x4E3A;&#x6BDB;&#x8981;&#x8BBE;&#x8BA1;"><a name="61-&#x4E3A;&#x6BDB;&#x8981;&#x8BBE;&#x8BA1;" class="anchor-navigation-ex-anchor" href="#61-&#x4E3A;&#x6BDB;&#x8981;&#x8BBE;&#x8BA1;"><i class="fa fa-link" aria-hidden="true"></i></a>6.1. &#x4E3A;&#x6BDB;&#x8981;&#x8BBE;&#x8BA1;</h2>
<blockquote>
<p>[!tip]
<strong>&#x5F53;&#x6570;&#x636E;&#x5E93;&#x6BD4;&#x8F83;&#x590D;&#x6742;&#x65F6;&#xFF0C;&#x9700;&#x8981;&#x8BBE;&#x8BA1;&#x3002;</strong></p>
</blockquote>
<p><strong>&#x597D;&#x7684;&#x6570;&#x636E;&#x5E93;&#xFF1A;</strong></p>
<ul>
<li><strong>&#x8282;&#x7701;&#x5185;&#x5B58;&#x7A7A;&#x95F4;</strong></li>
<li><strong>&#x4FDD;&#x8BC1;&#x6570;&#x636E;&#x5B8C;&#x6574;&#x6027;</strong></li>
<li><strong>&#x65B9;&#x4FBF;&#x5F00;&#x53D1;&#xFF0C;&#x7EF4;&#x62A4;</strong></li>
</ul>
<h2 id="62-&#x6570;&#x636E;&#x5E93;&#x8BBE;&#x8BA1;"><a name="62-&#x6570;&#x636E;&#x5E93;&#x8BBE;&#x8BA1;" class="anchor-navigation-ex-anchor" href="#62-&#x6570;&#x636E;&#x5E93;&#x8BBE;&#x8BA1;"><i class="fa fa-link" aria-hidden="true"></i></a>6.2. &#x6570;&#x636E;&#x5E93;&#x8BBE;&#x8BA1;</h2>
<ul>
<li><strong>&#x5206;&#x6790;&#x9700;&#x6C42;&#xFF1A;&#x9700;&#x8981;&#x5B9E;&#x73B0;&#x54EA;&#x4E9B;&#x529F;&#x80FD;&#xFF0C;&#x5BF9;&#x5E94;&#x7684;&#x9700;&#x8981;&#x521B;&#x5EFA;&#x54EA;&#x4E9B;&#x8868;&#x3002;</strong></li>
<li><strong>&#x8868;&#x793A;&#x5B9E;&#x4F53;&#xFF1A;&#x4E00;&#x5F20;&#x8868;&#x91CC;&#x9700;&#x8981;&#x521B;&#x5EFA;&#x54EA;&#x4E9B;&#x5B57;&#x6BB5;&#x3002;</strong></li>
<li><strong>&#x5B9E;&#x4F53;&#x5173;&#x7CFB;&#xFF1A;&#x6700;&#x540E;&#x6765;&#x5206;&#x6790;&#x8868;&#x95F4;&#x5B57;&#x6BB5;&#x7684;&#x5173;&#x7CFB;&#xFF0C;&#x80FD;&#x4E0D;&#x8BF4;&#x901A;&#xFF0C;&#x80FD;&#x4E0D;&#x80FD;&#x5B9E;&#x73B0;&#x529F;&#x80FD;&#x3002;</strong></li>
</ul>
<h1 id="7-&#x4E09;&#x5927;&#x89C4;&#x8303;"><a name="7-&#x4E09;&#x5927;&#x89C4;&#x8303;" class="anchor-navigation-ex-anchor" href="#7-&#x4E09;&#x5927;&#x89C4;&#x8303;"><i class="fa fa-link" aria-hidden="true"></i></a>7. &#x4E09;&#x5927;&#x89C4;&#x8303;</h1>
<ul>
<li><strong>&#x7B2C;&#x4E00;&#x8303;&#x5F0F;</strong><ul>
<li><strong>&#x539F;&#x5B50;&#x6027;&#xFF1A;&#x6BCF;&#x4E00;&#x4E2A;&#x5B57;&#x6BB5;&#x90FD;&#x662F;&#x4E0D;&#x53EF;&#x5728;&#x62C6;&#x5206;&#x7684;</strong></li>
</ul>
</li>
<li><strong>&#x7B2C;&#x4E8C;&#x8303;&#x5F0F;</strong><ul>
<li><strong>&#x6EE1;&#x8DB3;&#x7B2C;&#x4E00;&#x8303;&#x5F0F;</strong></li>
<li><strong>&#x6BCF;&#x5F20;&#x8868;&#x53EA;&#x63CF;&#x8FF0;&#x4E00;&#x4EF6;&#x4E8B;&#x60C5;&#x3002;&#x5B57;&#x6BB5;&#x5FC5;&#x987B;&#x4E0E;&#x4E3B;&#x952E;&#x5B8C;&#x5168;&#x76F8;&#x5173;&#xFF0C;&#x800C;&#x4E0D;&#x80FD;&#x4E0E;&#x4E3B;&#x952E;&#x90E8;&#x5206;&#x76F8;&#x5173;&#x3002;</strong></li>
</ul>
</li>
<li><strong>&#x7B2C;&#x4E09;&#x8303;&#x5F0F;</strong> <ul>
<li><strong>&#x6EE1;&#x8DB3;&#x7B2C;&#x4E8C;&#x8303;&#x5F0F;</strong></li>
<li><strong>&#x5B57;&#x6BB5;&#x5FC5;&#x987B;&#x8981;&#x4E0E;&#x4E3B;&#x952E;&#x76F4;&#x63A5;&#x76F8;&#x5173;&#xFF0C;&#x4E0D;&#x80FD;&#x95F4;&#x63A5;&#x76F8;&#x5173;&#x3002;</strong></li>
</ul>
</li>
</ul>
<blockquote>
<p>[!note|style:flat]
<strong>&#x89C4;&#x8303;&#x4E0E;&#x6027;&#x80FD;&#xFF0C;&#x6709;&#x65F6;&#x4E0D;&#x53EF;&#x517C;&#x5F97;&#xFF0C;&#x6027;&#x80FD;&#x66F4;&#x91CD;&#x8981;&#x3002;</strong></p>
<ul>
<li>&#x8003;&#x8651;&#x5230;&#x5546;&#x4E1A;&#x9700;&#x6C42;&#xFF08;&#x7528;&#x6237;&#x4F53;&#x9A8C;&#xFF0C;&#x5FEB;&#xFF09;&#xFF0C;&#x6570;&#x636E;&#x5E93;&#x8BA1;&#x7B97;&#x6027;&#x80FD;&#x66F4;&#x91CD;&#x8981;</li>
<li>&#x6545;&#x610F;&#x589E;&#x52A0;&#x5B57;&#x6BB5;&#xFF0C;&#x5C06;<code>join</code>&#x67E5;&#x8BE2;&#x6539;&#x4E3A;&#x5355;&#x8868;&#x67E5;&#x8BE2;</li>
<li>&#x589E;&#x52A0;&#x4E00;&#x4E9B;&#x8BA1;&#x7B97;&#x5217;&#xFF08;&#x7D22;&#x5F15;&#xFF09;</li>
</ul>
<p>&#x53C2;&#x8003;&#x535A;&#x5BA2;&#xFF1A;<a href="https://www.cnblogs.com/wsg25/p/9615100.html" target="_blank">&#x4E09;&#x5927;&#x8303;&#x5F0F;</a></p>
</blockquote>

                                
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